Perpendicular bisector of a line segment Practise these constructions until you can do them without looking at the instructions. Follow the instructions and draw this perpendicular bisector of a ...

Description This leg for a drawing compass has a brass top, which is jointed, and German silver pen points with an adjusting screw. Loosening the screw increases the width of the pen line to be drawn.

This leg for a drawing compass has a brass top, which is jointed, and steel pen points with a brass screw for adjusting the width of the pen line to be drawn. At the turn of the 20th century, ...